CN108646114B - Rail vehicle current collector abrasion test system - Google Patents
Rail vehicle current collector abrasion test system Download PDFInfo
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- CN108646114B CN108646114B CN201810573747.4A CN201810573747A CN108646114B CN 108646114 B CN108646114 B CN 108646114B CN 201810573747 A CN201810573747 A CN 201810573747A CN 108646114 B CN108646114 B CN 108646114B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/008—Testing of electric installations on transport means on air- or spacecraft, railway rolling stock or sea-going vessels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The application discloses rail vehicle current collector abrasion test system, not only contained the device that carries out mechanical abrasion test, still combined the current collector in-service use operating mode to add the simulation power supply rail power supply return circuit and the current receiving return circuit that can carry out the electrical wear test, make the abrasion test system that this application provided can carry out the electricity simultaneously-mechanical composite abrasion test, it is more similar with current collector in-service use operating mode, make the same current collector true wear situation that uses under the in-service use operating mode that can be more accurate based on the experimental data that this composite abrasion test system obtained judge and verify the friction of current collector, wearing and tearing and current receiving performance, thereby improve the comprehensive properties and the research and development efficiency of rail vehicle current collector product.
Description
Technical Field
The application relates to the technical field of railway vehicles, in particular to a railway vehicle current collector abrasion test system.
Background
The current collector (also called as collector shoe) is one of the key parts of a traction power supply system of a rail vehicle, is widely applied to traction power supply of urban rail vehicles, maglev trains, monorail trains, trams and the like, and has important influence on the safety, the economy and the operation efficiency of the rail vehicle.
When the rail vehicle runs, the current collector sliding block (comprising a carbon sliding block, a powder metallurgy sliding block and the like) is in contact with the power supply rail and slides relatively to complete current collection; the sliding block simultaneously bears mechanical impact, abrasion and electric abrasion, namely electric-mechanical combined abrasion, so that defects and damages such as abrasion marks, chipping, cracks, fractures, electric erosion pits and the like are caused, and the flow receiving quality and the service life of the sliding block are seriously influenced. Therefore, developing a current collector abrasion test to detect and verify the friction, abrasion and current collection performance of the current collector is an important way to improve the product quality and research and development efficiency of the current collector.
The existing current collector abrasion test system can only simulate the relative sliding between a power supply rail and a current collector sliding block in the practical use working condition of the current collector to carry out a mechanical abrasion test. However, in practical use, the railway vehicle current collector sliding block not only has mechanical abrasion, but also has serious electrical abrasion because the sliding block is an important part of a train traction power supply system and bears high voltage and large current during operation. The existing current collector abrasion test system cannot simulate the electrical load of the current collector in the actual use working condition, cannot carry out the current collector electro-mechanical composite abrasion test, and the test result cannot meet the requirements of detecting and verifying the friction and abrasion performance and the current collection quality of the current collector. .
Therefore, how to overcome various technical defects existing in the prior art of only carrying out a mechanical abrasion test on a railway vehicle current collector and provide a railway vehicle current collector abrasion test system which can simultaneously carry out an electro-mechanical composite abrasion test and can obtain a railway vehicle current collector abrasion test system which is more similar to the actual use working condition of the current collector, has higher simulation degree and more accurate test data is a problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
The utility model aims at providing a rail vehicle current collector wearing and tearing test system, not only contained the device that carries out mechanical wear test, still combined the current collector in-service use operating mode to add the simulation power supply rail power supply return circuit and the current receiving return circuit that can carry out the electrical wear test, make the wearing and tearing test system that this application provided can carry out the electricity simultaneously-mechanical composite wear test, it is more similar with current collector in-service use operating mode, make the same current collector true wear condition that uses under the in-service use operating mode that can be more accurate based on the experimental data that this composite wear testing system obtained judge and verify the friction of current collector, wearing and tearing and current receiving performance, thereby improve the comprehensive properties and the research and development efficiency of rail vehicle current collector product.
In order to achieve the above object, the present application provides a rail vehicle current collector abrasion test system, including:
an analog power supply rail 1, one side of which is in sliding contact with the current collector slider 31, and is used for transmitting current to the current collector body 311 through the current collector slider 31;
a power supply rail power supply circuit 2, which is provided with a brush 21 and a power supply box 22 for supplying power to the brush 21, wherein the brush 21 is in sliding contact with one side of the analog power supply rail 1 and is used for transmitting current to the analog power supply rail 1 through the brush 21;
the current collector loop 3 is provided with the current collector sliding block 31 and an adjustable test load 32 connected with the current collector sliding block 31 in series, and is used for receiving the current transmitted from the analog power supply rail 1 and forming a current loop;
and the moving mechanism 4 is connected with the analog power supply rail 1 or the current collector sliding block 31 and is used for driving the analog power supply rail 1 to move relative to the current collector sliding block 31 or driving the current collector sliding block 31 to move relative to the analog power supply rail 1 according to the received motion control command.
Optionally, this rail vehicle current collector wearing and tearing test system still includes:
the first voltage transformer 23 and the first current transformer 24 are both connected to the power supply rail power supply loop 2 and are respectively used for measuring actual voltage and actual current in the power supply rail power supply loop 2 in real time;
the second voltage transformer 34 and the second current transformer 33 are both connected to the current collector loop 3 and are respectively used for measuring the actual voltage and the actual current in the current collector loop 3 in real time.
Optionally, this rail vehicle current collector wearing and tearing test system still includes:
and the test state video monitoring device 5 is used for shooting a real-time test picture including the current collector sliding block 31 and the simulated power supply rail 1.
Optionally, this rail vehicle current collector wearing and tearing test system still includes:
and the data acquisition and regulation device is connected with the motion mechanism 4, the adjustable test load 32, the first voltage transformer 23, the first current transformer 24, the second voltage transformer 34, the second current transformer 33 and the test state video monitoring device 5, and is used for determining the comprehensive wear condition and the current collection quality of the current collector sliding block 31 according to the collected actual voltage, actual current and real-time test pictures, and sending corresponding control instructions to the motion mechanism 4, the power box 22 and the adjustable test load 32 according to the comprehensive wear condition and the current collection quality combined test requirements.
Optionally, when the moving mechanism 4 is connected to the analog power supply rail 1 and controls the analog power supply rail 1 to move relative to the current collector slider 31, the moving mechanism 4 specifically includes: a motor 41, a coupler 42, a bevel gear 43, a power supply rail driving shaft 44, a brake 45 and a power supply rail bracket 46; the driving shaft of the motor 41 is connected with a first bevel gear 431 through the coupler 42, a second bevel gear 432 is arranged at the middle section of the power supply rail driving shaft 44, the first bevel gear 431 is meshed with the second bevel gear 432, one end of the power supply rail driving shaft 44 is connected with the brake 45, the other end of the power supply rail driving shaft is connected with the power supply rail bracket 46, and the simulated power supply rail 1 is coated outside the power supply rail bracket 46.
Optionally, the current collector slider 31 and the brush 21 are respectively disposed at two ends of the analog power supply rail 1.
Optionally, the current collector slider 31 and the brush 21 are in sliding contact with different contact surfaces of the analog power supply rail 1, respectively.
Optionally, the test state video monitoring device 5 is specifically an industrial camera.
The application provides rail vehicle current collector wearing and tearing test system includes: one side of the analog power supply rail 1 is in sliding contact with the current collector sliding block 31 and is used for transmitting current to the current collector body through the current collector sliding block 31; a power supply rail power supply circuit 2, which is provided with a brush 21 and a power supply box 22 for supplying power to the brush 21, wherein the brush 21 is in sliding contact with one side of the analog power supply rail 1 and is used for transmitting current to the analog power supply rail 1 through the brush 21; the current collector loop 3 is provided with the current collector sliding block 31 and an adjustable test load 32 connected with the current collector sliding block 31 in series, and is used for receiving the current transmitted from the analog power supply rail 1 and forming a current loop; and the moving mechanism 4 is connected with the analog power supply rail 1 or the current collector sliding block 31 and is used for driving the analog power supply rail 1 to move relative to the current collector sliding block 31 or driving the current collector sliding block 31 to move relative to the analog power supply rail 1 according to the received motion control command.
Obviously, rail vehicle current collector abrasion test system that this application provided, not only contained the device that carries out mechanical abrasion test, still combined the current collector in-service use operating mode to add the simulation power supply rail power supply return circuit and the current receiving return circuit that can carry out the electrical wear test, make the abrasion test system that this application provided can carry out the electricity-mechanical composite abrasion test simultaneously, it is more similar with current collector in-service use operating mode, make the same current collector true wear situation that uses under the in-service use operating mode that can be more accurate based on the experimental data that this composite abrasion test system obtained judge and verify the friction of current collector, wearing and tearing and current receiving performance, thereby improve the comprehensive properties and the research and development efficiency of rail vehicle current collector product.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a railway vehicle current collector abrasion testing system according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another railway vehicle current collector abrasion testing system provided in the embodiment of the present application;
fig. 3 is a schematic structural diagram of an actual rail vehicle current collector abrasion testing system according to an embodiment of the present application;
fig. 4(a) is a top view of a schematic structural diagram of a simulated power rail and a power rail bracket according to an embodiment of the present application;
FIG. 4(b) is a schematic side view of a power rail and a power rail support assembly according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of an installation position of a contact surface between a current collector slider and an analog power supply rail according to an embodiment of the present application.
In the figure: 1. analog power supply rail 2, power supply rail power supply circuit 3, current collector circuit 4, motion mechanism 5, test state video monitoring device 11, analog power supply rail body 12, stainless steel belt 21, electric brush 22, power supply box 23, first voltage transformer 24, first current transformer 31, current collector slider 32, adjustable test load 33, second current transformer 34, second voltage transformer 41, motor 42, coupler 43, bevel gear 44, power supply rail driving shaft 45, brake 46, power supply rail support 311, current collector body 312, current collector support 431, first bevel gear 432 and second bevel gear
Detailed Description
The core of the application is to provide a rail vehicle current collector abrasion test system, not only contained the device that carries out mechanical abrasion test, still combined the current collector in-service use operating mode to add the simulation power supply rail power supply return circuit and the current receiving return circuit that can carry out the electrical wear test, make the abrasion test system that this application provided can carry out the electricity simultaneously-mechanical composite abrasion test, it is more similar with current collector in-service use operating mode, make the same current collector true wear situation that uses under the in-service use operating mode that can be more accurate based on the experimental data that this composite abrasion test system obtained judge and verify the friction of current collector, wearing and tearing and current receiving performance, thereby improve the comprehensive properties and the research and development efficiency of rail vehicle current collector product.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The following description, with reference to fig. 1 and fig. 2, respectively corresponds to two different rail vehicle current collector abrasion test system implementation manners, including:
an analog power supply rail 1, one side of which is in sliding contact with the current collector slider 31, and is used for transmitting current to the current collector body 311 through the current collector slider 31;
the power supply rail is also called a third rail, and is a rail which is laid along an urban rail transit line and is used for supplying power to rail vehicles (including subways, light rails, monorail, magnetic suspension trains and the like). Rail transit vehicles draw electrical energy from a supply rail through a current collector (collector shoe). In an actual circuit, a power supply rail and a walking rail are laid in parallel, and a current collector moves in a single direction relative to the power supply rail.
Under experimental conditions, limited by space, a unidirectional moving annular simulation power supply rail and a fixed-position current collector sliding block are usually adopted to simulate actual working conditions, wherein the annular simulation power supply rail continuously moves in a unidirectional manner under the driving of a movement mechanism, and the current collector sliding block is in sliding contact with one side of the annular simulation power supply rail. In addition, there is also an implementation mode that a section of linear analog power supply rail with a fixed position and a current collector sliding block which reciprocates on the linear analog power supply rail under the driving of a motion mechanism are adopted.
A power supply rail power supply circuit 2 provided with a brush 21 and a power supply box 22 for supplying power to the brush 21, the brush 21 being in sliding contact with one side of the analog power supply rail 1 for transmitting current to the analog power supply rail 1 through the brush 21;
the current collector loop 3 is provided with a current collector sliding block 31 and an adjustable test load 32 connected with the current collector sliding block 31 in series, and is used for receiving the current transmitted from the analog power supply rail 1 and forming a current loop;
the adjustable test load 32 provides the load of the current collector loop 3, and the electric loads of different types and models of railway vehicles can be simulated by adjusting the impedance of the adjustable test load 32.
Both the current collector slider 31 and the brush 21 can be in sliding contact with a plurality of contact surfaces of the analog power supply rail 1, as shown in fig. 5, the current collector slider 31 can be in sliding contact with an upper contact surface, a lower contact surface or a side contact surface of the analog power supply rail 1 to respectively correspond to the ground-up current collector, the ground-down current collector and the ground-testing current collector. The brushes 21 are not shown in fig. 5, but may be in sliding contact with the respective contact surfaces as long as electric energy supplied from the power supply box 22 can be transmitted to the analog power supply rail 1. However, in the actual test process, when the brush 21 and the current collector slider 31 are in sliding friction with the simulated power supply rail 1, the generated wear products will adhere to the surface of the simulated power supply rail 1 to form a thin layer with a lubricating effect, and in order to avoid the wear products of the brush 21 and the current collector slider 31 from mixing with each other, it is usually necessary to make the brush 21 and the current collector slider 31 contact with different contact surfaces of the simulated power supply rail 1. Meanwhile, in order to improve the uniformity of the current flowing from the brush 21 to the current collector slider 31 through the analog power supply rail 1, the brush 21 and the current collector slider 31 are usually disposed at both ends of the analog power supply rail 1 (or disposed at both ends of the diameter when an annular analog power supply rail is used).
Preferably, in order to monitor the voltage and the current values in the power supply rail power supply loop 2 and the current collector loop 3 in real time and provide test data for test process monitoring control, current collection quality evaluation, current collector slider wear mechanism analysis and the like, an element for monitoring the real-time voltage and the current values in the loops can be further arranged in the power supply rail power supply loop 2 and the current collector loop 3, and one implementation manner is as follows:
the first voltage transformer 23 and the first current transformer 24 are both connected to the power supply rail power supply loop 2 and are respectively used for measuring actual voltage and actual current in the power supply rail power supply loop 2 in real time;
the second voltage transformer 34 and the second current transformer 33 are both connected to the current collector loop 3 and are respectively used for measuring the actual voltage and the actual current in the current collector loop 3 in real time.
The actual voltage and the actual current in a loop are measured through a voltage transformer and a current transformer, so that data support is provided for test process monitoring control, current collection quality judgment, current collector sliding block abrasion mechanism analysis and the like.
And the motion mechanism 4 is connected with the simulated power supply rail 1 or the current collector slide block 31 and is used for driving the simulated power supply rail 1 to move relative to the current collector slide block 31 or driving the current collector slide block 31 to move relative to the simulated power supply rail 1 according to the received motion control command.
Specifically, there are two movement manners, which correspond to fig. 1 and fig. 2, respectively, where fig. 1 shows that the current collector slider 31 is fixed in position, the annular analog power supply rail 1 continuously moves in a single direction under the control of the movement mechanism, and as can be seen by referring to fig. 5, the current collector slider 31 is in sliding contact with the side surface of the annular analog power supply rail 1 at this time; fig. 2 shows that the analog power supply rail 1 with a certain length is fixed in position, and the current collector slider 31 continuously and cyclically moves back and forth on the analog power supply rail 1 under the control of the movement mechanism. Both the two implementation manners can simulate the relative motion between the current collector slider 31 and the power supply rail under the actual use condition, but compared with the corresponding manner of fig. 2, the corresponding manner of fig. 1 obviously can simulate the relative motion state between the current collector slider 31 and the current collector slider under the actual use condition more truly without the restriction of other influence factors, and can be flexibly selected by combining the restriction conditions existing under the actual conditions.
The motion mechanism 4 has a plurality of construction schemes for realizing the driving and motion control functions, and can be composed of a motor including a direct current motor or an alternating current motor, various transmission shafts for transmitting the motion of the motor, a driving shaft and a connecting device for connecting the driving shaft with a driven object. When the driving shaft of the motor is vertically arranged with the driving shaft of the driven object, the bevel gear group can be used for transmission; when the two are arranged in parallel, the transmission can be realized through a spur gear set or the two are arranged coaxially. The specific composition of the movement mechanism 4 also needs to be specifically designed according to the size of a test site, the rotating speed of the power supply rail, the rotating speed control requirement and the like.
Referring to fig. 3, fig. 3 shows a composition form of a motion mechanism 4, which corresponds to the implementation manner that the motion mechanism shown in fig. 1 is connected to an annular analog power supply rail 1 and drives the motion mechanism to continuously move in a single direction so that the motion mechanism and a current collector sliding block 31 with a fixed position move relatively, and specifically includes a motor 41, a coupler 42, a bevel gear 43, a power supply rail driving shaft 44, a brake 45 and a power supply rail bracket 46; the driving shaft of the motor 41 is connected with a first bevel gear 431 through a coupler 42, a second bevel gear 432 is arranged in the middle section of the power supply rail driving shaft 44, the first bevel gear 431 is meshed with the second bevel gear 432, one end of the power supply rail driving shaft 44 is connected with the brake 45, the other end of the power supply rail driving shaft is connected with the power supply rail bracket 46, and the analog power supply rail 1 is coated outside the power supply rail bracket 46. The connection between the power supply rail holder 46 and the analog power supply rail 1 is shown in fig. 4(a) and 4 (b).
On the basis of using a voltage transformer and a current transformer to acquire actual voltage and actual current values in a loop, the parameters can also correspond to the abrasion conditions of the current collector sliding block 31 in real time, such as good grinding, arc ablation pits, cracks, chipping, fracture and the like, and the corresponding relation between the abrasion state and the characteristic voltage and current values is established, so that data support can be provided for monitoring and controlling the test state process, analyzing the abrasion mechanism of the current collector sliding block and monitoring the fault of the current collector in the actual operation process. One of the methods is as follows: and the test state video monitoring device 5 is used for shooting a real-time test picture including the current collector sliding block 31 and the simulated power supply rail 1. Specifically, the test state video monitoring device 5 can select an industrial camera.
According to the above description, the voltage and current parameters of the corresponding loop can be obtained from the voltage transformer and the current transformer, the real-time test picture including the current collector slider 31 and the analog power supply rail 1 can be obtained from the test state video monitoring device 5, and the data can be processed and analyzed in real time by means of the data obtaining and regulating device.
The data acquisition and regulation device is realized in the following mode: the testing device is connected with the moving mechanism 4, the adjustable testing load 32, the first voltage transformer 23, the first current transformer 24, the second voltage transformer 34, the second current transformer 33 and the testing state video monitoring device 5, and is used for determining the comprehensive wear condition and the current collection quality of the current collector slider 31 according to the collected actual voltage, actual current and a real-time testing picture, and sending corresponding control instructions (including a motion control instruction, an output control instruction and an impedance control instruction) to the moving mechanism 4, the power box 22 and the adjustable testing load 32 according to the comprehensive wear condition and the current collection quality and the testing requirements.
In the following, referring to fig. 3, in this embodiment, a mode of unidirectional rotation of the annular analog power supply rail 1 relative to the fixed current collector slider 31 is adopted to simulate the relative motion existing between the two under the actual operating condition, and specifically, a side-grinding type current collector of the magnetic suspension train is adopted.
The test system consists of a simulation power supply rail 1, a power supply rail power supply loop 2, a current collector loop 3, a power supply rail motion mechanism, a test process monitoring system and a central control system.
As shown in fig. 5, the simulated power rail 1 is formed by a cladding structure formed by a simulated power rail body 11 made of an annular aluminum alloy and a stainless steel band 12, and the simulated power rail 1 is formed by roll forming, welding and other manners to simulate a steel-aluminum composite power rail used by an actual circuit; the simulated power supply rail 1 is driven by the simulated power supply rail motion mechanism and rotates to simulate the relative motion between the real power supply rail and the current collector sliding block 31. The specific driving implementation manner is as shown in fig. 4, a power supply rail support 46 is arranged in the annular analog power supply rail 1, the power supply rail support 46 can be formed by welding profiles, pipes and the like made of carbon steel, stainless steel, aluminum alloy and the like, and the power supply rail support has the advantages of light weight, small mass and rotational inertia, quick adjustment response, simple structure, high manufacturing precision, low cost and the like. Meanwhile, the power supply rail bracket 46 and the analog power supply rail 1 can be connected by means of bolts or welding. It should be noted that in this embodiment, the analog power supply rail 1 should have a diameter large enough to make the contact interface between the current collector slider 31 and the analog power supply rail 1 approximately planar, so as to better restore the actual operating condition.
The power supply rail motion mechanism consists of a motor 41, a coupler 42, a bevel gear 43, a power supply rail driving shaft 44, a brake 45 and a power supply rail bracket 46, the driving, braking, rotating speed and angular acceleration control of the simulated power supply rail 1 is realized through the motor 41 and the brake 45, the starting, braking and different running speeds and accelerations in the actual running working condition of the rail vehicle can be simulated, the linear speed adjustment range of the power supply rail is 0-50m/s, and the running speed range of the rail vehicles such as urban rail vehicles, maglev trains, monorail trains, trams and the like is covered; the braking mode can be disc braking, axle-hung braking, resistance braking, regenerative braking and the like.
The power supply rail power supply loop 2 is composed of a power supply box 22, a cable and a brush 21, the brush 21 supplies required voltage and current to the upper contact surface of the analog power supply rail 1 through sliding contact, and the power supply box 22 supplies power supply voltage of DC 1500V to the analog power supply rail 1 through the brush 21 in the embodiment. The power box 22 can also provide power supply systems of AC 25kV, DC 3000V, DC 1500V, DC +/-750V and the like, and the power supply current and power cover the traction current and power range of rail vehicles such as urban rail vehicles, maglev trains, monorail trains, trams and the like; specifically, when the power supply system is DC ± 750V, the current collector slider 31 needs to be grounded, and the original system grounding point needs to be connected to the DC-750V end of the power box.
The current collector loop 3 is composed of a current collector support 312, a current collector body 311, a current collector slider 31, a cable, an adjustable test load 32 and a grounding device, in this embodiment, the current collector slider 31 in the current collector loop 3 is in sliding contact with the measurement surface of the analog power supply rail 1 to receive the current transmitted from the analog power supply rail 1, and forms a current loop together with the adjustable test load 32 and the grounding device. The current collector support 312 may also provide various mechanical interfaces or tools, and may be used to mount various types of current collectors, and adjust vertical and horizontal mounting positions of the current collectors; the impedance characteristic of the adjustable test load 32 is adjustable, and the impedance of various types and kinds of rail vehicles under actual operation conditions can be simulated. It should be noted that, when the top-grinding type or bottom-grinding type current collector is adopted, the width of the sliding block should be smaller than the width of the analog power supply rail; when the wear-measuring current collector is adopted, the height of the sliding block of the wear-measuring current collector is smaller than that of the analog power supply rail.
Meanwhile, the power supply rail power supply loop 2 and the current collector loop 3 also comprise necessary insulation measures to ensure the safety of testers and a test system.
The test process monitoring system consists of a voltage transformer and a current transformer which are arranged in the power supply rail power supply loop 2 and the current collector loop 3, and an industrial camera which is arranged near the current collector sliding block 31, and is used for collecting and monitoring the actual voltage and current of the power supply rail power supply loop 2 and the current collector loop 3, and displaying the real-time test pictures of the power supply rail 1 and the current collector sliding block 31 so as to monitor the abrasion condition, the current collection quality and the like of the current collector sliding block 31 in the test process. The test range of the voltage and current transformer in the test process monitoring system can also cover the traction power supply voltage and current range of urban rail vehicles, maglev trains, monorail trains, trams and other rail vehicles, and the voltage and current transformers and the industrial cameras have high enough sampling frequency.
The central control system is composed of computer hardware and control software, can intensively display actual voltage, current parameters, real-time test pictures and calculated abrasion states and current receiving quality collected by the test process monitoring system, and sends corresponding control commands to the power supply rail movement mechanism, the adjustable test load 32 and the power box 22 according to test data and specific test requirements so as to realize centralized monitoring and control.
When actually carrying out the experiment, give the motion control instruction that makes the linear velocity adjustment of simulation power supply rail 1 be 32.3m/s to motor 41, open power supply box 22 and provide DC 1500V voltage to simulation power supply rail 1 through brush 21, and with the impedance adjustment of adjustable experimental load 32 for drawing the power supply impedance the same with the maglev train, through setting up voltage and current transformer and the industry camera control test process in power supply rail power supply circuit 2 and current collector return circuit 3 simultaneously, the information that can provide includes: the actual voltage, current, power and fluctuation data thereof in the power supply-current receiving loop can reflect the current receiving capacity, stability and current receiving quality of the current receiver; the data of the voltage drop of the contact surface of the analog power supply rail 1 and the current collector sliding block 31 reflecting the voltage and the power loss in the current collection process; the real-time images such as chip dropping, block dropping, cracks, fracture and arc discharge of the current collector sliding block 31 which reflects the mechanical abrasion and the electrical abrasion of the current collector sliding block and can be used for analyzing the current collector electro-mechanical composite abrasion mechanism. After the test is finished, the electric brush 21 and the current collector sliding block 31 are separated from the surface of the simulated power supply rail 1, the power box 22 and the adjustable test load 32 are disconnected, the power supply of the motor 41 is turned off, and the brake 45 is started to stop the motion of the simulated power supply rail 1.
The implementation describes the technical scheme and the implementation method of the current collector electro-mechanical composite abrasion test of a certain side-grinding type magnetic-levitation train, and for other types of rail vehicles including upper-grinding, lower-grinding and side-grinding type current collectors of urban rail vehicles, monorail trains, tramcars and the like, the electro-mechanical composite abrasion test can be completed only by adjusting corresponding power supply rail structures and rotating speeds, power supply voltage of a power supply box, the positions of current collector sliding blocks and the positions of electric brushes. Therefore, the electric-mechanical composite abrasion test system for the railway vehicle current collector provided by the invention has strong applicability, universality and expandability.
Meanwhile, the application also provides the following implementation schemes which can be replaced as well, including:
analog supply rail alternatives: the simulated power supply rail body 11 made of the stainless steel strip 12 coated with the annular aluminum alloy adopted in the above embodiment forms a simulated power supply rail 1 structure, and an alternative scheme may be a simulated power supply rail body made of the stainless steel strip embedded in the annular aluminum alloy to form a simulated power supply rail structure, or an annular simulated power supply rail structure made of a single material (aluminum alloy, copper alloy, etc.); the material of the analog power supply rail body can be replaced by copper alloy, stainless steel and other materials with good conductivity, and the stainless steel band can be replaced by low-carbon steel, copper alloy, aluminum alloy and other materials with good conductivity and wear resistance;
power supply rail motion alternative: the power supply rail movement mechanism is formed by the motor, the coupler, the bevel gear, the power supply rail driving shaft and the brake, the motor and the power supply rail driving shaft can be coaxially arranged and mounted at the lower end of the power supply rail driving shaft, and the coupler is used for connecting the motor and the power supply rail driving shaft, so that the bevel gear is omitted, and under the alternative scheme, the braking mode can be disc braking, axle-clasping braking, resistance braking, regenerative braking and the like;
power supply rail power supply mode alternative: the above-described embodiments employ a power supply means in which brushes are brought into sliding contact with the simulated power rail surface to supply test voltage and current thereto, and alternatively a cable may be used to supply power to the power rail. In this alternative, one end of the cable is connected (welded or bolted) to the simulated power rail body made of an annular aluminum alloy, and the other end is laid along the power rail bracket and the power rail drive shaft and connected (welded or bolted) to a copper ring coaxially mounted on the surface of the power rail drive shaft, and the power box supplies power to the copper ring through the brushes, thereby conducting the test voltage and current to the power rail. It should be noted that when this alternative is adopted, the voltage, current transformers and insulation measures provided in the supply circuit should be adapted accordingly.
Because the situation is complicated and cannot be illustrated by a list, a person skilled in the art can realize that many examples exist according to the basic method principle provided by the application and the practical situation, and the protection scope of the application should be protected without enough inventive work.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It will be apparent to those skilled in the art that various changes and modifications can be made in the present invention without departing from the principles of the invention, and these changes and modifications also fall within the scope of the claims of the present application.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (7)
1. A rail vehicle current collector abrasion test system, comprising:
one side of the analog power supply rail (1) is in sliding contact with a current collector sliding block (31) and is used for transmitting current to a current collector body through the current collector sliding block (31); the current collector sliding block can be in sliding contact with an upper contact surface, a lower contact surface or a side contact surface of the analog power supply rail;
a power supply rail power supply circuit (2) provided with a brush (21) and a power supply box (22) for supplying power to the brush (21), wherein the brush (21) is in sliding contact with one side of the simulated power supply rail for transmitting current to the simulated power supply rail through the brush (21);
the current collector loop (3) is provided with the current collector sliding block (31) and an adjustable test load (32) connected with the current collector sliding block in series and used for receiving the current transmitted from the simulation power supply rail (1) and forming a current loop;
the moving mechanism (4) is connected with the analog power supply rail (1) or the current collector sliding block (31) and is used for driving the analog power supply rail (1) to move relative to the current collector sliding block (31) or driving the current collector sliding block (31) to move relative to the analog power supply rail (1) according to a received motion control command;
the current collector sliding block (31) and the electric brush (21) are in sliding contact with different contact surfaces of the analog power supply rail (1) respectively.
2. The testing system of claim 1, further comprising:
the first voltage transformer (23) and the first current transformer (24) are connected to the power supply rail power supply loop II and are respectively used for measuring actual voltage and actual current in the power supply rail power supply loop (2) in real time;
and the second voltage transformer (34) and the second current transformer (33) are connected to the current collector loop (3) and are respectively used for measuring the actual voltage and the actual current in the current collector loop (3) in real time.
3. The testing system of claim 2, further comprising:
and the test state video monitoring device (5) is used for shooting a real-time test picture comprising the current collector sliding block (31) and the simulated power supply rail (1).
4. The testing system of claim 3, further comprising:
data acquisition and regulation and control device, with motion (4) adjustable experimental load (32) first voltage transformer (23) first current transformer (24) second voltage transformer (34) second current transformer (33) and experimental state video monitoring device (5) all link to each other for according to actual voltage, actual current and the real-time test picture of gathering, confirm the comprehensive wearing and tearing situation and the mass of receiving current of current collector slider (31), and according to the comprehensive wearing and tearing situation with it is right to receive the experimental requirement of mass combination motion (4) power supply box (22) with adjustable experimental load (32) send corresponding control command.
5. Test system according to claim 1, characterized in that when the kinematic mechanism (4) is connected to the analog power supply rail (1) and controls the motion of the analog power supply rail (1) relative to the current collector slider (31), the kinematic mechanism (4) comprises in particular: the device comprises a motor (41), a coupler (42), a bevel gear (43), a power supply rail driving shaft (44), a brake (45) and a power supply rail bracket (46); the driving shaft of the motor (41) is connected with a first bevel gear (431) through the coupler (42), a second bevel gear (432) is arranged in the middle section of the power supply rail driving shaft (44), the first bevel gear (431) is meshed with the second bevel gear (432), one end of the power supply rail driving shaft (44) is connected with the brake (45), the other end of the power supply rail driving shaft is connected with the power supply rail support (46), and the analog power supply rail (1) is wrapped outside the power supply rail support (46).
6. Test system according to claim 5, characterized in that the current collector slider (31) and the brush (21) are arranged at both ends of the simulated power supply rail (1), respectively.
7. Testing system according to claim 3, characterized in that the test status video monitoring device (5) is embodied as an industrial camera.
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| CN109945929A (en) * | 2019-04-12 | 2019-06-28 | 中铁高铁电气装备股份有限公司 | A kind of magnetic floats power rail-collector shoe Performance Test System and test method |
| CN110987342B (en) * | 2019-11-29 | 2022-05-13 | 中车株洲电力机车有限公司 | Dynamic performance test device of current collector |
| CN113932748B (en) * | 2020-06-29 | 2022-07-05 | 株洲中车时代电气股份有限公司 | Train brake shoe abrasion evaluation method based on big data and related equipment |
| CN113155488B (en) * | 2021-04-15 | 2023-05-23 | 中铁检验认证中心有限公司 | Shoe rail relation test stand |
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| CN101339112B (en) * | 2008-08-19 | 2010-12-22 | 东南大学 | Machine tool guiding rail friction wear testing machine |
| CN201945502U (en) * | 2011-03-09 | 2011-08-24 | 西华大学 | Clamp for current-carrying friction-wear test |
| CN202421000U (en) * | 2012-02-23 | 2012-09-05 | 湖南大学 | Tester for current-carrier friction abrasion of electric contact materials |
| CN203672762U (en) * | 2013-12-31 | 2014-06-25 | 天津市威泰五金制品有限公司 | Contact rail friction testing machine |
| CN106144906A (en) * | 2015-04-15 | 2016-11-23 | 上海宝冶工业工程有限公司 | The wear detector of crane Electricity collecting frame and crane Electricity collecting frame |
| CN105021483B (en) * | 2015-07-14 | 2017-08-04 | 北京信息科技大学 | The method of testing of a kind of friction of wet clutch wear extent and test bed |
| CN105716983B (en) * | 2016-04-28 | 2018-05-15 | 吉林大学 | A kind of electrical analogue friction plate inertia subscale test platform of multi- scenarios method |
| CN105738133A (en) * | 2016-05-04 | 2016-07-06 | 中国铁道科学研究院 | Rail vehicle multifunctional braking power testing platform |
| CN207164162U (en) * | 2017-08-09 | 2018-03-30 | 自贡东新电碳有限责任公司 | One kind is by electric material high speed dynamic performance and testing |
| CN107352353B (en) * | 2017-08-15 | 2019-05-03 | 日立电梯（中国）有限公司 | Elevator rope pulley sliding frictional wear life-span test system and its test method |
| CN107804174A (en) * | 2017-09-26 | 2018-03-16 | 中车青岛四方机车车辆股份有限公司 | Control method, the device and system of pantagraph current collector |
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